None of them knew what happened __________we told them about it.
#57554
A
since
B
after
C
until
D
while
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_____ he was very tired, he continued working in his office.
#55324
A
Since
B
Although
C
As soon as
D
Because
None of them knew what happened __________we told them about it.
_____ he was very tired, he continued working in his office.